X1 10M/C (Camb)

Which expression is equal to cos 𝑥 + sin 𝑥 ?

Which expression is equal to cos 4𝑥?

What is the probability of getting 3 sixes and 2 fours in any order when a standard die is rolled 5 times?

What is the component of the vector 4𝐢 in the direction of the vector 𝐢 + 𝐣?

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The diagram shows the velocity at time 𝑡 of a particle that moves over a 10 second time interval. For what percentage of the time is the speed of the particle decreasing?

• 20%

• 30%

• 60%

• 70%

• 1

• 2

• 3

• 4