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Q1 of 104 Page 193

Verify:
sin60 =

and

L.H.S.

R.H.S

⇒

⇒

More from this chapter

1

Verify:

cos60 = 1 – 2sin²30 = 2cos²30 – 1 = cos²30 – sin²30

1

Verify:

sin60 = 2sin30 cos30

1

Verify:

cos60 =

1

Verify:

cos90 = 4cos³30 – 3cos30