If sin 20 degree=a and cos20 degree=b then which of the following represents the correct value of sin 70 degree in terms of a and/or b? 1) a+b 2) a 3) b 4)a-b

ANSWER

3) b

EXPLANATION

Given that:

and

Recall that the sine and cosine functions are equal for complementary angles.

This implies that,

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10.416 m/s

step-by-step explantion:

distance=100m

time= 9.6s

average speed=100/9.6

=10.416 m/s