Question

if sin B + cos B = 5/4. then the value of sin B cos B is...​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

first square the (sinB + cosB)² = 25/16

then u will get sin²B + cos²B +2sinBcosB = 25/16

1+ 2sinBcosB =25/16

2sinBcosB = 25/16 - 1

2sinBcosB = 9/16

sinBcosB = 9/8