APPLYING TRIG IDENTITIES TO TRIG EXPRESSIONS

CATEGORY SUM & DIFFERENCE IDENTITY

$$\sin54\degree\cos16\degree-\cos54\degree\sin16\degree$$

Which one of the following ratios, if any, is equivalent to the above expression?

CATEGORY SUM & DIFFERENCE IDENTITY

$$\cos25\degree\cos10\degree-\sin25\degree\sin10\degree$$

Equivalent Trig Ratio $$\rightarrow$$ ​ (a)  

CATEGORY

SUM & DIFFERENCE IDENTITY

All ANGLES are in DEGREES

$$\frac{\tan65-\tan29}{1+\tan65\tan29}$$

Equivalent Trig Ratio

Submit $$TRIG\ N$$

(no decimals)

CATEGORY DOUBLE ANGLE IDENTITY

$$1-2\sin^242\degree$$

Which one of the following ratios, if any, is equivalent to the above expression?

CATEGORY DOUBLE ANGLE IDENTITY

$$\frac{2\tan24\degree}{1-\tan^{\ 2}24\degree}$$

Equivalent Trig Ratio $$\rightarrow$$ ​ (a)  

CATEGORY

DOUBLE ANGLE IDENTITY

All ANGLES are in DEGREES

$$2\sin84\cos84$$

Equivalent Trig Ratio

Submit $$TRIG\ N$$

(no decimals)

CATEGORY

HALF ANGLE IDENTITY

$$\sqrt[]{\frac{1-\cos32\degree}{1+\cos32\degree}}$$

Which one of the following ratios, if any, is equivalent to the above expression?

CATEGORY HALF ANGLE IDENTITY

$$\sqrt[]{\frac{1-\cos22\degree}{2}}$$

Equivalent Trig Ratio $$\rightarrow$$ ​ (a)  

CATEGORY

HALF ANGLE IDENTITY

All ANGLES are in DEGREES

$$\sqrt[]{\frac{1-\cos16}{\sin16}}$$

Equivalent Trig Ratio

Submit $$TRIG\ N$$

(no decimals)

CATEGORY SUM & PRODUCT IDENTITY

$$\cos37\degree\sin25\degree$$

Which one of the following ratios, if any, is equivalent to the above expression.