1) If sin A =3/4
calculate.cos. A ond tan A
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Answer: If sin A is 3/4 ,then cos A will √7/4 and tan A will be 3/√7.
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Step-by-step explanation:
sin A = 3/4
sin A = opposite side/Hypotenuse.
opposite side = 3 units
Hypotenuse = 4 units
Adjacent side = ?
According to Pythagoras theorem,
According to Pythagoras theorem,Square on the hypotenuse is the sum of squares on other 2 sides.
Hence we get:
4² = 3² + (adjacent side)²
16 = 9 + (adjacent side)²
7 = (adjacent side)²
adjacent side = √7 units
Cos A = Adjacent side/Hypotenuse
Cos A = √7/4
Tan A = Opposite side/Adjacent side
Tan A = 3/√7
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