If cos α = 0.188 and sin β = 0.679 with both angles’ terminal rays in Quadrant-I, find the value of sin(a+b)=

Question

If    cos α = 0.188    and    sin β = 0.679    with both angles’ terminal rays in Quadrant-I, find the value of sin(a+b)=

Edward C. · Accepted Answer

There's a formula for the sine of the sum of 2 angles. You should look it up in your textbook (or other learning material). It's

sin(A+B) = sin(A)cos(B) + cos(A)sin(B)

Use the given information to find the required values, then just plug them into the formula.

1 Expert Answer