Sin(α + 90) = cos (α)
Added by Emmanuel J.
Step 1
Now, we can use the angle addition formula for sine, which states that sin(α + β) = sin(α)cos(β) + cos(α)sin(β). So, sin(α + π/2) = sin(α)cos(π/2) + cos(α)sin(π/2). We know that cos(π/2) = 0 and sin(π/2) = 1. Show more…
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